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Best Detective Agency in USA

GAMSI Detective is the leading best detective agency in USA. Trusted for last 17+ years and having largest network of detective agents in across all over USA.

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Best Detective Agency in USA

Best Private Detective Services in USA

Top Private Personal Background Check  Surveillance Pre Marriage Corporate Detective & Investigation Agency in USA (America)

Are you looking for a professional and reliable detective agency in USA?

Doubts Can Disturb You Deeply – We are Here to Help You Find the Truth!

In today’s complex world, clarity and truth matter more than ever, because truth define insides of the person. Whether it’s resolving personal concerns, securing sensitive business information, or supporting legal cases, our detective agency in the USA delivers dependable investigative solutions tailored to your unique situation. With deep experience in U.S. law, local jurisdiction nuances, and investigative best practices, we help individuals, attorneys, and corporations uncover facts with discretion and precision.

You deserve the real truth, backed by solid evidence.

That’s where GAMSI Detective Agency in USA comes in the picture, with having 17+ years of investigation experience, male and female investigators, and complete confidentiality in every case we handle.

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Our Detective Services in USA

🔍 From the bustling streets of New York to the tech hubs of California, our licensed private investigators operate with full adherence to U.S. legal standards, ensuring every case is ethical, confidential, and actionable. We combine cutting-edge technology with seasoned investigative skills to provide evidence, insight, and peace of mind to clients across all 50 states.

If you’re an NRI from India or Asia dealing with matters in the USA, we understand how stressful and confusing it can feel. Our detective agency in the USA specializes in helping overseas clients resolve personal, matrimonial, corporate, and legal issues with clarity and confidence.

Matrimonial Detective Agency in USA

1. Pre Matrimonial Detective

Considering to get married? It’s for your entire life, you deserve and also must be aware of everything about your soon-to-be husband/wife with our Pre Matrimonial Detective Services.

We will verify:

  • Job, salary, office, and Designation.
  • Family background and reputation.
  • Previous associations and love affairs (If Any).
  • Bad Habits like smoking, alcoholic, abuser, or gambler.
  • Criminal history (if any).

“We believe it’s Better to be sure before marriage rather be regretful after for a lifetime.”

2. Post Matrimonial Detective

If you are going through emotional stress/disturbance from sudden negative transformations in your spouse or spouse’s behavior such as night trips, secret calls, cold/distant attitude, ignoring, abusing. So, here we come to your aid through our Post Marriage Detective Services.

We’ll investigate:

  • Extra-marital affairs.
  • Unusual behavior.
  • Financial secrecy.
  • Secret social activities.
  • Physical Surveillance (If Required).

You’ll be shown real-time evidence (videos/pics) to make an informed decision at the end.

3. Physical Surveillance Services

Physical Surveillance is the heart and soul of the detective tasks we do, We silently observe the target person to gather solid evidence.

  • Day & night movement tracking.
  • Who they meet and where they go.
  • Photos, videos, vehicle numbers.

All this is done discreetly and legally by our trained male and female detectives in USA.

Relationship & Loyalty Test Investigation Service

Suspicion is bound to follow love. If you wonder if your husband or spouse is hiding something important from you, then the expert loyalty test investigation service in America might come in handy to unearth truth with utmost secrecy.

  • Know if your spouse if he/she is loyal to you or not?.
  • Recognize flirting, cheating, or lying to you.
  • Collect emotional and visual evidence.

“We and You you’ll also believe that” A broken truth is better than a beautiful lie.”

5. Cyber Crime & Digital Fraud Investigation

In today’s digital world, threats can come to you at your laptop or mobile screen.

We handle:

  • Email or social media hacking.
  • Blackmail or online threats.
  • Identity theft or financial fraud.
  • Cyberstalking or fake profiles.

We combine our technology with investigation to caught online criminals.

7. Background Verification Service.

Whether someone is hiding or trying to do fraud with you, don’t worry we trace:

  • Tenants with fake IDs
  • Ex-partners or fraudsters

Our strong network of detectives in United States of America and legal tools help us find proofs.


Why People Trust Us As the Best Detective Company in USA

  • 100% Confidentiality Guaranteed

We are a professional detective agency that values your confidentiality above all, your identity and case information stay with us only. Never to be disclosed to anyone under any circumstances.

  • Evidence-Based Reporting

You get complete investigation report with accompanying images, videos, and timeline report to guide your decision-making.

  • Fast Turnaround Time

Typically it will take 3 to 8 days for the average personal investigation. You will be informed daily.

Lowest Private Detective Fees

Package Detective Service Package rates begin at just 60$. No hidden charges.

  • Experienced Team of Private Investigators in USA

– Our team of expert private detectives includes experienced detective agents in America, ex-police mans, cyber experts, and trained investigators, both male and female are available.

  • Emotional Support

– We understand in what pain and stress you are going through. We listen to you without being judgmental.

Licensed Investigators – Lawful Evidence, Real Results.

Our investigation agency follows all applicable state licensing requirements, federal privacy laws, and ethical guidelines governing private investigations in the USA. This means the information we gather is not just accurate , it’s also legally usable for attorneys, courts, immigration cases, corporate decisions, and personal matters. We never rely on shortcuts, illegal methods, or questionable sources.

We also believe in transparency. Before starting any investigation, we clearly explain what is legally possible and what is not, so there are no surprises later. You’ll know how the investigation will be conducted, what type of evidence can be collected, and how it can be used, especially important for NRIs managing cases from overseas.

Why Legal Compliance Matters More Than You Think

Hiring an unlicensed or non-compliant investigator in the USA can do more harm than good. Illegally obtained information can be rejected in court, damage your case, or even expose you to legal risk. That’s why choosing a licensed detective agency in the USA isn’t just a formality – it’s a necessity.

When you work with us, you’re not just hiring investigators. You’re partnering with professionals who respect U.S. law, protect your privacy, and deliver results you can rely on. Whether your case involves personal concerns, corporate matters, or legal proceedings, you can move forward knowing everything has been handled the right way, legally, discreetly, and responsibly.

How Our Detective Service Helped a Client in USA.

It is something more than another job to be done for us at GAMSI Detective Agency, it’s the trust, emotions, and future and the entire life of a person. It is they that come to us of their own free will with doubts, suspicions, and unanswered questions, and it is our privilege to give to them clarity, peace of mind, and the answer they should be informed.

Following is the genuine story of one of our client in USA whose life changed after utilizing our expert and discreet detective services.


          “I honestly didn’t know where to start when I first reached out. I had a situation that involved someone living in another state, and I was worried about privacy, legality, and whether this would even work. From the very first call, they didn’t promise anything unrealistic, which actually made me trust them more.

They explained what was legally possible in the U.S. and what wasn’t, walked me through the process step by step, and kept everything discreet. Communication was clear, updates were timely, and I never felt like I was being left in the dark. Most importantly, the information they provided was solid and professional, something I could actually rely on.

If you’re looking for a detective agency that operates the right way, respects U.S. laws, and treats your case seriously, this team does exactly that. I’m glad I found them, and I wouldn’t hesitate to recommend their services.

– Jason Miller, California

Please Note: The testimonial we shared above has been published with the client’s official consent. At GAMSI Detective’s, we strictly respect and protect the privacy of our every client. Your trust and confidentiality are our top priority.


Some Areas Where Our Private Detectives Operate Across the USA

Our local Private Investigator are active in:

Our Local Private Investigators Are Active In:

  • New York – New York City, Brooklyn, Queens, Bronx, Long Island
  • New Jersey – Edison, Jersey City, Newark, Iselin
  • California – Los Angeles, San Francisco, San Jose, Fremont, Sunnyvale
  • Texas – Houston, Dallas, Plano, Austin
  • Illinois – Chicago, Naperville, Schaumburg
  • Florida – Miami, Orlando, Tampa
  • Georgia – Atlanta, Alpharetta, Johns Creek
  • Virginia – Fairfax, Ashburn, Arlington
  • Washington – Seattle, Bellevue, Redmond
  • Massachusetts – Boston, Cambridge, Waltham

 Ensuring complete coverage.

Contact the Best Private Investigator Agency in USA!
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Best Private Investigation Service United States of America

Our Detective Services

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Why Choose Us?

Lowest Price Detectives in USA.

Your trusted and certified detective and investigation partner agency. Contact us Now!

Experienced Detectives
17+ Years of Experience

With 19+ years of experience, Founders leads Gamsi Detectives with heart, heritage, and a passion for justice.

Succecfully Solved Investigations
Successfully Solved Cases

Our dedicated team of private detectives has successfully solved thousands of cases, earning us the trust of countless individuals and businesses. That’s why we stands proud as USA’s most trusted and authentic detective agency.

Team of Experienced Detective Agents
Team of Experienced Detectives

With a team of highly experienced detective agents, we’ve earned a 92% success rate in matrimonial investigations—because your peace of mind matters.

Confidentiality
Confidentiality

We deeply respect your privacy. Every detail you share stays 100% confidential, always safe, never shared. 

Transparency
Transparency

As a professional and top private detective agency in USA, we believe in complete transparency, sharing every proof with our clients. Because your peace of mind is our ultimate goal.

Prompt Results
Prompt Results

Cases are handled quickly & we are available 24/7 to assist. You will be receiving ongoing private investigation information and guidance every time. 

What services Gamsi Detective agency in USA offer?

GAMSI detective agency in USA can be helpful for matrimonial verification, background check, loyalty test, pre-wedding background verification, after wedding investigation, physical tracking, employee verification, company fraud case, missing person trace, and taking evidence for legal matters.

Surveillance is legal in the USA when conducted in public places and within legal boundaries. Investigators cannot trespass, invade private property, or violate reasonable expectations of privacy. We ensure all surveillance activities comply with applicable state laws.

The price of detective in USA in the range of $800 to $1400 and it may change according to case type, level of work, and duration of investigation. Background checks of minor cases may be cheap, while corporate fraud cases or tracking may be expensive. GAMSI Detectives can offer lowest cost professional detectives and investigators in USA.

Yes! This is called a pre-matrimonial investigation or before marriage background check and is very common in USA. It helps verify details about a person’s background, habits, job, family and also criminal records (if any) before taking big life decisions. Connect with us for more get free consultation.

Absolutely! A professional detective agency like GAMSI Detectives in USA ensures complete secrecy of your identity and case details, so you can trust them fully.

Time depends upon the investigation type. Certain cases could take days, while those that involve rigorous tracking verification could take weeks. It all depends upon the case. Kindly Connect with us via call or WhatsApp to get more accurate information.

It’s recommended to meet once to discuss the case in detail, but many agencies also allow secure communication through phone, email, or encrypted apps.

Look for agencies with good reviews, verified experience, licensed professionals, and a strong track record of handling cases similar to yours. GAMSI Detectives is the best, trusted and award winning detective agency in America.

Absolutely. NRIs and overseas clients can legally hire a detective agency in the USA. The investigation is conducted within U.S. jurisdiction and laws, while clients receive regular updates remotely through secure communication channels.

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